What seemed to help me was changing all graphics settings from low to max and then putting them back to defaults (post process off though). I also switched multi-thread off and back on again. I originally had my settings on low and was getting freezes / stutter with influence areas + delirium.

I also enabled in-game v-sync and disabled the in-game fps cap instead opting to use nvidia control panel to cap fps slightly under my monitor refresh rate to minimize input lag.

It could be confirmation bias but this has seemingly helped with the stuttering. I suspect the shader additions in the latest patch played a part in reducing this issue for me as well. Anyway it's worth a try, hope it helps.

Specs - 3700x; 2070s; nvme ssd; 16gb ram 3733 @ CL16